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Related Concept Videos

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
Flame Photometry: Overview01:02

Flame Photometry: Overview

Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for electronic transitions. As a result...
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In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...

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Related Experiment Video

Updated: Jun 17, 2026

Bringing the Visible Universe into Focus with Robo-AO
10:35

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Published on: February 12, 2013

NASA Program of Airborne Optical Observations.

M Bader, C B Wagoner

    Applied Optics
    |January 16, 2010
    PubMed
    Summary

    NASA utilizes jet aircraft for airborne scientific research, offering mobility and altitude advantages over ground-based studies. These platforms support diverse experiments in fields like astronomy and meteorology.

    Area of Science:

    • Atmospheric science
    • Earth observation
    • Astronomy

    Background:

    • NASA Ames Research Center operates advanced aircraft platforms for scientific research.
    • Airborne research offers unique advantages over ground-based, balloon, rocket, or satellite methods.

    Purpose of the Study:

    • To describe the capabilities of NASA's airborne research facilities.
    • To highlight the advantages of using aircraft for scientific investigations.

    Main Methods:

    • Operation of a Convair 990 jet transport for carrying multiple experiments to high altitudes.
    • Limited use of a Lear Jet for specialized, single-experiment missions.

    Main Results:

    • The Convair 990 can carry approximately twelve experiments to 12 km for extended durations.

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    Integrated Photoacoustic Ophthalmoscopy and Spectral-domain Optical Coherence Tomography
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    Published on: January 15, 2013

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  • The Lear Jet supports single experiments up to 15 km for one hour.
  • Conclusions:

    • Airborne platforms provide significant mobility and altitude benefits for scientific research.
    • Aircraft offer a cost-effective solution for complex research missions compared to other platforms.